Alexandrite is one of the most desired gems. It is green in daylight and red in artificial light. This beauty is the official birth stone for June.
The most desired Alexandrite gemstones were mined in Russia but the deposits in the Urals are worked out. Today they are mined in Brazil, Sri Lanka, and Rhodesia. They are part of the gem family Chrysoberyl.
Sizes above one carat are rare and finer gems are often more expensive than comparably sized rubies or sapphires.